[Form 4] Alphatec Holdings, Inc. Insider Trading Activity

Rhea-AI Filing Summary

David Sponsel, Executive Vice President, Sales of Alphatec Holdings, Inc. (ATEC), reported planned sales of common stock under a Rule 10b5-1 trading plan adopted June 12, 2025. The Form 4 shows sales on September 18, 2025 of 137,445 shares at an average price of $15.09 and on September 19, 2025 of 2,555 shares at a weighted average price of $15.34, leaving the reporting person with 531,861 shares beneficially owned after the transactions. The Form 4 was executed by an attorney-in-fact on the reporting dates and discloses that the September 19 price is a weighted average for multiple trades.

Positive

• Transactions were executed under a Rule 10b5-1 trading plan, indicating preplanned, compliant insider sales.
• Filing discloses weighted-average pricing and offers to provide trade-level details upon request, supporting transparency.

Negative

• Reporting person sold a total of 140,000 shares (137,445 on 09/18/2025 and 2,555 on 09/19/2025), reducing holdings to 531,861 shares.
• Sales represent realized insider liquidity, which could be perceived negatively by some investors despite being preplanned.

Insights

Financial Analyst

TL;DR: Insider executed preplanned sales totaling 140,000 shares under a 10b5-1 plan; impact appears neutral absent other company events.

The reported transactions are sales, not purchases, and were effected pursuant to a Rule 10b5-1 trading plan adopted June 12, 2025, which limits contemporaneous informational inference. Total reported shares sold equal 140,000, at average prices of approximately $15.09 and $15.34. Post-transaction beneficial ownership is reported as 531,861 shares. For investors, these planned disposals are routine insider liquidity events and do not, by themselves, signal a change in company fundamentals.

Corporate Governance Expert

TL;DR: Use of a documented 10b5-1 plan indicates procedural compliance; documentation reduces concern about opportunistic timing.

The filing explicitly marks the transactions as pursuant to a Rule 10b5-1 plan and provides an explanatory footnote with price ranges for the weighted-average sale. The Form 4 is properly signed by an attorney-in-fact. From a governance standpoint, reliance on a pre-established trading plan and disclosure of weighted-average pricing enhance transparency around insider sales, though the filing does not address management intent or ongoing shareholding policy.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Sponsel David

(Last) (First) (Middle)

C/O ALPHATEC SPINE, INC.

1950 CAMINO VIDA ROBLE

(Street)

CARLSBAD CA 92008

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Alphatec Holdings, Inc. [ ATEC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, SALES

3. Date of Earliest Transaction (Month/Day/Year)
09/18/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/18/2025		S(1)		137,445	D	$15.09	534,416	D
Common Stock	09/19/2025		S(1)		2,555	D	$15.34(2)	531,861	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 12, 2025.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.26 to $15.39, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

	/s/ Tyson E. Marshall, Attorney-in-Fact	09/19/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did the Form 4 filed for ATEC report?

The Form 4 reports that David Sponsel sold 137,445 shares on 09/18/2025 at an average price of $15.09 and 2,555 shares on 09/19/2025 at a weighted average price of $15.34.

Were the insider sales for ATEC part of a trading plan?

Yes. The filing indicates the sales were effected pursuant to a Rule 10b5-1 trading plan adopted on June 12, 2025.

How many ATEC shares does the reporting person own after these transactions?

After the reported sales, the Form 4 shows the reporting person beneficially owned 531,861 shares.

Does the Form 4 provide specific per-trade prices for the 09/19/2025 sales?

No. The Form 4 discloses a weighted average price of $15.34 for the 09/19/2025 sales and states trades ranged from $15.26 to $15.39; the filer offers to provide detailed trade-level counts on request.

Who signed the Form 4 filing?

The Form 4 was signed by Tyson E. Marshall, Attorney-in-Fact on 09/19/2025.